Retrieval practice enhances long term retention by actively recalling information from memory.

• A. Spacing
• B. Interleaving
• C. Retrieval practice
• D. Encoding

Answer: (C)

Actively recalling information from memory strengthens long-term retention. This retrieval practice effect happens because trying to retrieve a memory reinforces and stabilizes the memory trace, making it easier to access in the future. Each successful recall helps build stronger retrieval cues and improves the ability to reconstruct the memory when you need it later, which is why practice that involves recalling—not just reviewing—yields better long-term retention.

Spreading study sessions over time (spacing) helps because it forces you to retrieve after some forgetting has begun, which enhances retention through distributed practice. Interleaving mixes different topics during study to improve discrimination and transfer, a different benefit that aids problem-solving across contexts. Encoding is about getting information into memory in the first place; while essential, it doesn’t by itself explain the memory strengthening that comes from actively retrieving information.